Power-transmission system.



l W. F. SMITH.

POWER TRANsn/nssloN SYSTEM. l

APPLICATION FILED MAR. 8, ISIS.

Patentedl Dec. 18, i1917.

Original applicationtiled- January'21, 1915, Serial No. 9,430.` Divided 1916. Seria1'No. 82,90 1.

UNITED STATESPATENT OFFICE.

WILLIAM F. SMITH, OF BROOKLYN, NEW YORK, ASSIGNOR TO WESTERN ELECTRIC COMPANY, INCORPORATED, OF NEW YO.7R K,' 1\T. Y., A CORPORATION 0F NEW YORK.

POWER-TRANSMISSION SYSTEM.

To all 'whom z't may concerm.

Be it known that. I, WILLIAM F. SMITH, a citizenof the United States, residin at Brooklyn, in the county of Kings and tate of New York, have .invented certain new and useful Improvements in Power-Trans. mission Systems, of which the following is .a full, clear, concise, and exact descriptlon.

This invention relates to ower transmission systems, .and is a divlsion of my copending application,` Serialv No. 3430, led

January 21 1915, issued as Patent No.

1,182,591 of. May 9, 1916'.

It is an object of this invention 'to provide such. a system in which a constantly rotating driving member may be operatively connected with-a'member to be-driven in-such man-.` ner that -such member to be driven will be f started at a low speed and graduallydncreased to' normal'or full speed. In accordance with one'feature'of this`invention, there is provided a pairof-variable lpressure clutch members and-a pairofconstant pressure clutch members interposed be-- tween, yand adapted to operatively connect a constantly rotating driving member and a Vmember to be driven together with means for causing engagementiof the variablepressure clutch'members, whereby the variable and constant pressure clutch-.members cooperate to control the 4speed of the driven member. l

Other features of this invention'relate to n combinations of parts and details of con-- struction as will hereinafter appear.

This invention is illustrated in the accompanying drawings in which the same reference. characters are used throughout to designate the same parts, and in which- Figuie 1 is a view in section of a portion.

of aclutch device. according to this invention, vand Fig. 2 is a plan view of a portion lof a 'flat prevented by the shoulder 92 on the .sleeve annular friction disk.

The draw-ings show a power transmission system embodying this invention .as applied to the machine which is described in Patv which forms a bearing for the main shaft 24 carrying a gear 30 and Aextending' upward through plate 22 and from which the ai151 ti1`is application 'mea March s,

specicatipn oftetfefsjr'aam.- Patentea'nee. 18,1917.

'housing 60, and is supported'in a bearing 62 formed in thejmain supporting frame 23. To the upper end 'of'..xthe hollowT Ashaft 61 is keyed a' spiral gear '63, which meshes with a spiral gear on a' shaft 65 which may be assumed as .being operated by any suitable drivlng means." 4 i The. hollow'shaft 61 carries a'clutch collar 67,-which is attached thereto by means of feather keys 68, 68'..v The collar 67 is rovided with a-clrcula-r flange 69, in which' there are-threeopenings 70, '-spaced 120 aparte-forl the reception .ofgscrews .71, 71.

"The flange 69 is alsoprovided with three pockets 7 2, 72,` spaced 120 apart, .each being 60 from one of the :openings 70, 70. 1 A -frlctlon vcone ring-73 having an 'inner cone face 74, 4is secured to the col,

lar 671by4 means of the screws 71, 71, andis adapted ,to move vertically with respect tothe collarA 67. This friction cone ring 73 is provided with three pockets 75, 75, spaced 120 apart, which are opposite the pockets 72,A 72 provided in-the flange vv69, and co f operate therewith -for thel reception of cushioning springs 76, 76. .A shifting collar 80 1s secured to the clutch collar 67 by means of a clutch collar ring 81, and is provided upon opposite sides thereofwith projecting pins 82, 82 (only one of which is shown),

'each of which is engagedby one of vthe forked ends 83, 83 of a clutch lever 84 vvhich 1s pivoted to the clutch housing 60 at 85.

Immediately below the hollow shaft 61, a'

bushing is keyed tothe main shaft 24. A sleeve 91 is keyed to the bushing 90 and is provided with a'shoulder 92, upon which rests afrction cone ring 93 adapted to rotate independently ofthe sleeve 91. Vertical .movement of the friction cone ring 93 is 91 and by acircular flange 89 provided on the bushing 90. The friction cone ring93 is vprovided with a'cone facev 94, adapted for frictional engagement lwith the cone face 74 of the friction cone ringv 73 and to be rotated 91 a plurality. of flat annular friction disks 97, each provided with a number of .openings 98 for the reception of short cylinders 'orinserts 99 of cork, wood, leather, fiber,

felt or Vsome other similar material. The Short cork cylinders 99 have frictiona'l'en gagement with flat annular friction disks 100, which alternate with the disks 97', and

. which are-'secured to the friction cone ring 93 by means of six screws l101 passing through Aopenings in the disks 100 and through the 'openings 96 in the friction cone ring 93, and having engagement with bushings 102 seated in the openings 96. A circular flange 88, formed on the lower part of the sleeve 91, coperates with the flange 95- the tension of` the springs 103 and conselquently, the degree of friction between the rin g disks.

The tension of the springs 103, 103 is adjusted so that the friction between the disks`100, 100, and the cork inserts 99, 99, is greater than the friction between the cone faces 74 and 94 of the cone rings 73,

and' 93 respectively, when there is a great amount of slip between these cone faces, as

at starting, but less than thefriction between the cone faces when thereis little or no slip between these cone faces.l It will be readily apparent therefore that should the cones become jammed when setting, slipping takes place between the disks 100, 100 and the cork inserts 99, 99. Such an arrange-` ment insures that the -main shaft 24 will, under all circumstances, be started at low speed.- It is also to be noted that the adjustment of the tension between the disks and the cork inserts is such that, when car- -rying the full load, some slipping will take lplace between the disks and the cork inserts.

When the outer' end of the clutch lever 84 is raised, the forked extremities 83, 83 of the forward 'end thereof, engaging the pins 82, 82 move the clutch collar 67 downward, which, through the cushioning springs 76, 76 moves the cone ring 73 downward to cause light frictional engagement between its vcone face 74 and thecone face 94 of theV cone ring 93. Motion is then transmitted yfrom the cone ring '73 to cone ring 93, which in itsI turn transmits motion to the main shaft 24' through the frictional engagement of the disks 100, 100 carried by the cone ring 93, and the'cork inserts 99, 99, of the disks 97, 97 carried by the main shaft 24. As the friction between the 'cone rings 73 and 93' increases, due to further raising. of the outer end of the clutch lever 84, the speed of. the main shaft 24 increases. The cone ring .73 has only a limited vertical movement. The cushioning springs 7 6, 76 serve tovprevent to a degree the jamming of the cone rings 73 and 93, and the friction disks 97 and 100 act to prevent the sudden increase in speed of the main shaft 24,should the cone rings 73 and 93 jam when starting the machine. The .clutch collar 67 has considerably more vertical movement than the cone ring 73, with the result that when the main shaft 24 has'been started, and its speed gradually increased, the. downward movement of the clutch collar 67 may continue until teeth 105, 105 provided on the lower end thereof, engage with teeth 106, 10.6 provided on thel upper face of the flange 89 of the bushing 90, whereby the friction cone rings 7 Sand 93 and the friction disks 97, 97 and 100,100 are entirely eliminated from the transmission system, andthe main shaft 24 is driven direct from the hollow shaft. 6l through only the clutch collar 67 and the bushing 90.

- Any suitable means, such as that described in my Patent N o. 1,182,591, hereinbefore referred to, may be employed forraising or lowering the outer end of clutch lever 84 for respectively starting or stopping the rotation of the main shaft 24. `Due to the fact that the downward-movement of the cone ring 73 iis transmitted from the clutch collar 67, through the compression springs 76, 76, the probability of jamming the friction cone rings 73 and 93 by a sudden raising of the outer end of clutch lever 84 is considerably reduced. However, should the outerend of the clutch lever be raised too fast, resulting in a great amoant of friction between the cone rings 73and 93, slipping takes place betweenA the disks 100,

100, and the cork inserts 99, 99, carried by the disks 97, 97, whereby the main shaft 24 is prevented from starting at full speed.

In order to stop the rotation of the main shaft 24, it is only-necessary-to so operate the above mentioned meansthat Athe outer end of clutch lever 84 is lowered and thereby causes the disengagement ofthe teeth 195,A 105, and 106, 106, and of the friction cone rings 73 and 93.

In machines for winding insulating material about wires, it is ofthe utmost importance that the winding head which winds the insulating material about the wire be, started at very low speed and gradually increased to normal or full speed, in order to amount of breakage of the insulating material. By the use of 'a'power transmission culties heretofore eX erienced are overcomen and the desired resu tsacomplished.

What is claimed is:

1. In a power transmission system, the combination of a driving member, a member to be driven, a pair of variable pressure clutch members and a pair of constant pressure clutch members interposed between and adapted to operatively connect said driving .member and said driven member, and means for causing engagement of said variable pressure clutch members whereby said variable and said constant pressure clutch members coperate to control-the Inotion transmitted from said driving to said driven member. i

2. In a power-transmission system, the combination of'afdriving member, a member to be driven, a. pair of variablepres'- sure clutch members and a pair of constant pressure clutch members interposed between and adaptedto operatively connect said driving and sald driven members, means for causing engagement of said variable pr e s` l sure clutch members, whereby said variable and said constant pressure clutch memberscoperate to vstart said driven member at low speed and to gradually increase 4the soA speed vtl'1ereof,"andI normally disengagedv vmeans carried by lsaid driving and vsaid driven ymembers for vdirectly connecting saidl members and eliminating said clutch ymembers, the engagement of sald second mem tioned-fmeans occurring subsequentto the my name this 7th day of March, A. D. 1916. 3. In a power transmission system, thef combination. of a driving member, a memspeeding up of said driven member.

4ber to be driven, 'a pair normally dis-- engaged variablepres'sure clutch members, one of which is carriedv by said driving member, a pair of constant pressure clutch members, Aone ofwhich is carried'by said driven member, the other being carried by the other ofI said variable Vpressure clutch members, andA means for causing engagement of said variable pressure clutch members whereby said variable and said-con? stant pressure clutch members coperate to start said driven member atlow speed..

4. In va power transmissionv system', the

combination of a driving member, a friction cone operatlvely connected thereto, 'a

member to be driven, a set of friction disks operatively connected thereto, a second fric' tion cone adaptedto be engaged by the said 'first friction cone, a.' set of friction Ydisks voperatively connected tofsaid second fric-- tion cone, a pluralityl of cork inserts .mounted in each disk of one set and engaging unf#` der constant pressure-d1sks -of said other,

set, a toothed member mounted'on said dri v ning member, a toothed member mounted on said driven member andadaptedto be en- 'gagedby said other. toothed member, and

means forl causing engagement of said friction lcones whereby said cones coperate with said disks to start said driven member at low speed and to gradually increase the speed thereof, and for thereafter causing Vengagement of said'toothed members whereby said ,friction cones and disks are eliminated. t

` In witness whereof, I hereunto subscribe svnTH.- 

